Mahjong Solitaire X is a solitaire matching game that uses a set of Mahjong tiles. Mahjong Solitaire X contains 60 levels with different layouts. Mahjong Solitaire X is 100% free game. There is NO pop-up or full screen ads. There is NO in-app-purchase. A tile that can be moved left or right without disturbing other tiles is said to be exposed.